local vfs_index = {}
local server = "test-server"
local server_channel = 9996
local r_channel = 9997

dofile("huffman.lua")

local command = {
  update = "update"
}



local modem = peripheral.find("modem")
modem.open(r_channel)


function getMessage(msg)
  modem.transmit(server_channel,r_channel,server..string.char(175,175,175)..msg)
  while true do
    local ev,side,c1,c2,msg = os.pullEvent("modem_message")
    if c1 == r_channel and c2 == server_channel then
      if msg:sub(1,#server) == server then
        msg = msg:sub(#server+1)
        if msg:sub(1,3) == string.char(175,175,175) then
          msg = msg:sub(4)
          return msg
        end
      end
    end
  end
end




function update()
  local ret = getMessage(command.update)
  local txt = huffman.decode(nil,ret,true)
  vfs_index = textutils.unserialize(txt)
end

function getFile(path)
  local ret = getMessage(command.getFile..path)
  local txt = huffman.decode(nil,ret,true)
  return txt
end

update()
return vfs_index